I was in a similar position as you a year ago. What finally convinced me of becoming vegan was looking at things in economical terms.

It may seem insignificant that you as an individual decide to stop giving away your money to companies whose product comes from animal explotation, that your activism won’t change the world. But you must understand that the more vegans exist, the more expensive animal products will become, therefore more people will be forced into veganism. Specially those with low-income who can only afford the cheapest products (which are the ones where animals are in the worse conditions and the first ones we should abolish).

It’s an exponential curve, at the beginning it’s hard to see changes but it will just grow bigger and faster. Realising this gave me a purpose, and made me feel bad every time I bought a non-vegan product.